New Intake Manifold; Mech OMP Concern

vex · 01-01-2017, 12:11 AM

I've got a design for a custom intake manifold and am beginning the mental process of working through installation. While doing this, it struck me that I still have the OMP to consider. I will be using a standard throttle body (say a mustang 90mm for sake of arguement), but that precludes any out-of-the box attachment to the mechanical OMP control rod. So what are my options?

Some ideas that come to my mind are:
Convert to electric omp (i think i can run it on my ps1k)
Modify the tb to accept the control rod--this won't go well
Block-off and premix (I'd like to avoid that if possible)

Are there any other options I should consider? Are there anythings i need to be aware of with the aforementioned items?

JL1RX7 · 01-01-2017, 05:33 PM

Sounds like you answered your own question. Premix.

Only other option would be the Sohn(sp) (Rotary Aviation) adapter for adding the premix.

If you are using an aftermarket controller if it has an extra digital output for straight on/off control for a pump, or if you are lucky an analog output that is variable.

Pete_89T2 · 01-01-2017, 07:13 PM

If your ECU can drive it, I'd go the electronic OMP route. You'll need to swap in an S5 front cover as well.

vex · 01-03-2017, 12:25 PM

Is there any detriment to just locking the mechanical OMP to max besides increased oil consumption?

***TitaniumTT*** · 01-03-2017, 01:06 PM

I don't understand why people are so confused on the concept of pre-mixing. Hell, even my little renni get's premix as well as the electric OMP.

I suspect a cable wold be very easy to setup to control the OMP mechanically, and if the PS1k can rock the electric, I would go that route with the Sohn adapter and premix in the tank as well.

vex · 01-03-2017, 03:47 PM

Now that's an idea B. Maybe a bicycle type cable and piggybacking/modifying the TB might work. Will need to look into and validate that I have the stepper motor output available for the OMP (I can't remember if I was already going to use that for a IAC, but I can always get away with either the A or D out).

I do like the Sohn idea.

Looks like the Sohn adapter offered by RA is only available for the OMP-style (or the Renni).

01-01-2017, 12:11 AM	#1
vex RCC Loves Me Not You Join Date: Jul 2008 Location: Influx. iTrader: (6) Posts: 2,113 Rep Power: 19	New Intake Manifold; Mech OMP Concern I've got a design for a custom intake manifold and am beginning the mental process of working through installation. While doing this, it struck me that I still have the OMP to consider. I will be using a standard throttle body (say a mustang 90mm for sake of arguement), but that precludes any out-of-the box attachment to the mechanical OMP control rod. So what are my options? Some ideas that come to my mind are: Convert to electric omp (i think i can run it on my ps1k) Modify the tb to accept the control rod--this won't go well Block-off and premix (I'd like to avoid that if possible) Are there any other options I should consider? Are there anythings i need to be aware of with the aforementioned items? __________________ The Official FC Radiator Thread My Project Thread: Cerberus CCVT Virginia Rotary Group

01-03-2017, 12:25 PM	#4
vex RCC Loves Me Not You Join Date: Jul 2008 Location: Influx. iTrader: (6) Posts: 2,113 Rep Power: 19	Is there any detriment to just locking the mechanical OMP to max besides increased oil consumption? __________________ The Official FC Radiator Thread My Project Thread: Cerberus CCVT Virginia Rotary Group

01-03-2017, 01:06 PM	#5
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	I don't understand why people are so confused on the concept of pre-mixing. Hell, even my little renni get's premix as well as the electric OMP. I suspect a cable wold be very easy to setup to control the OMP mechanically, and if the PS1k can rock the electric, I would go that route with the Sohn adapter and premix in the tank as well. __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

01-03-2017, 03:47 PM	#6
vex RCC Loves Me Not You Join Date: Jul 2008 Location: Influx. iTrader: (6) Posts: 2,113 Rep Power: 19	Now that's an idea B. Maybe a bicycle type cable and piggybacking/modifying the TB might work. Will need to look into and validate that I have the stepper motor output available for the OMP (I can't remember if I was already going to use that for a IAC, but I can always get away with either the A or D out). I do like the Sohn idea. Looks like the Sohn adapter offered by RA is only available for the OMP-style (or the Renni). __________________ The Official FC Radiator Thread My Project Thread: Cerberus CCVT Virginia Rotary Group Last edited by vex; 01-03-2017 at 04:34 PM..

01-01-2017, 05:33 PM	#2
JL1RX7 Rotary Fanatic Join Date: Feb 2008 Location: Front Royal, VA iTrader: (1) Posts: 487 Rep Power: 17	Sounds like you answered your own question. Premix. Only other option would be the Sohn(sp) (Rotary Aviation) adapter for adding the premix. If you are using an aftermarket controller if it has an extra digital output for straight on/off control for a pump, or if you are lucky an analog output that is variable.

01-01-2017, 07:13 PM	#3
Pete_89T2 Lifetime Rotorhead Join Date: Apr 2010 Location: Elkton, MD iTrader: (1) Posts: 874 Rep Power: 15	If your ECU can drive it, I'd go the electronic OMP route. You'll need to swap in an S5 front cover as well.